1985) Fletcher, Richard A. The Barbarian Conversion: from Paganism to Christianity, University of California Press, 1999, , Rossi, Cesare, Russo, Flavio & Russo, Ferruccio. Ancient Engineers' Inventions: Precursors of the Present, Springer, 2009, , 9789048122523 Schnitker, Harry. Margaret of York on Pilgrimage, in Reputation and Representation in fifteenth century Europe, eds. Douglas Biggs, Sharon D. Michalove, Albert Compton Reeves, BRILL, 2004, , Stokstad, Marilyn. Medieval Art, Harper & Row, 1986. Treadgold, Warren T., A History of the Byzantine State and Society, Stanford University Press, 1997, , Crowns (headgear) Medieval European metalwork objects Germanic archaeological artifacts Gold objects Visigothic art Votive offering Medieval crowns 7th century in the Visigothic Kingdom